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arm64 page table / page size docs

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Daniel Micay 2022-09-08 23:17:25 -04:00
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@ -181,6 +181,13 @@ large number of guard pages created by hardened\_malloc. As an example, in
This is unnecessary if you set `CONFIG_GUARD_SLABS_INTERVAL` to a very large
value in the build configuration.
On arm64, make sure your kernel is configured to use 4k pages since we haven't
yet added support for 16k and 64k pages. The kernel also has to be configured
to use 4 level page tables for the full 48 bit address space instead of only
having a 39 bit address space for the default hardened\_malloc configuration.
It's possible to reduce the class region size substantially to make a 39 bit
address space workable but the defaults won't work.
## Configuration
You can set some configuration options at compile-time via arguments to the